If you depress your window switch and your window is motionless, check for a noise. If you don't hear anything, odds are you have a bad window motor. Genuine part sourced from Porsche AG in Germa...
Coupe Bj. 86 nur bis Fg.-Nr. 91 GS 100 800, Targa Bj. 86 nur bis Fg.-Nr. 91 GS 140 332, Cabrio Bj. 86 nur bis Fg.-Nr. 91 GS 150 383, Turbo Bj. 86 nur bis Fg.-Nr. 93GS000236